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This paper demonstrates six possible cooperative relays from the procedure of Decode-and-Forward relay, and designs their soft combining schemes accordingly. All these schemes are designed for LTE-A system, by the principle of being compatible and making minimum modification to the current LTE system. Among the co-relay schemes, some of them are with high forwarding efficiency, and some of them are...
Network coded retransmission without soft combining (NC ARQ) has been studied for multicast or for multiple unicast. Some papers also mentioned that the soft combining with NC information will be the proper way to improve the receiving performance. However, some papers didn't mention the detailed combining procedure, and most papers on soft combining used extrinsic information for iterative decoding...
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